When you develop 4th Dimension applications, switching between open windows is a routine task. Open windows in the Design environment are listed at the bottom of the Design menu:
The OS X Dock provides an easy way to reach any open window in an application. Clicking and holding on a running application's name displays a popup of open windows:
The Dock's popup window list can be used to switch windows or make 4th Dimension the frontmost application with a specific window selected.